Spraying nozzle



June 15, 1937. F. E. MARCY SPRAYING NOZZLE Filed Oct. 8. 1

E\ an 1/l/I/IlIll/IIIIllltlll1I unnun u" I a I I I I. l I I I 1 l I n l I u "r u n m u- Patented June 15, 1937 PATENT-OFFICE SFBAYI NG NOZZLE Frank E. Marcy, San Diego, Calif. Application October a, 1935, Serial No. 44.090 g 2 Claims. (or. 299-140) This invention relates to a spraying nozzle, and particularly to anaspirating nozzle thatmay be used for mixing liquid fertilizer or other treating agents with water as it is sprayed upon grass.

plants or trees.

An object bf this invention is to provide a spray nozzle of simple and economical construction which includes elements for regulating theLcon- -centration of the treating agent. An object is to provide a 'spraynozzle including anadjustable deflector plate for controlling the shape of the projected jet or spray. A further object is to pro-' vide a spray nozzle of the aspirating type in which the water passages are designed so that the nozzle is self-priming. 4

These and other objects and advantages of the invention will be apparent from the following specification when taken with the accompanying drawing in which: v

Fig. 1 is a perspective view of anembodiment of the invention;

Fig. 2 is a longitudinal central section through the nozzle; and

Figs. 3, 4 and 5 are transverse sections taken on the respective planes indicated by lines 3-3.

4-4, and 5-5 ofFig. 2.

In the drawing, the r erence numeral I--'i'den- ,tifles the main section 0 the nozzle, this section being threaded at the intake end to receive the gg-coaxial, but shorter, inner nozzle 2' that has the usual couplingv end 3 for receiving the complementary coupling member 4 on the end of a section of garden hose 5. litre inner nozzle 2 is of less diameter than the bore of the main section I, thus forming an annular chamber 8 at the inner end of the nozzle. The bore is preferably of circular cross-section throughout its length and, in front of the chamber 0, the inner wall sections 1, 8 are oppositely tapered to form a minimum diameter. at a'point spaced inwardly from the nozzle outlet 9. i This minimum diameter section is of circular cross-section while the outlet opening it of the inner nozzle 2 is of square cross-section. Treating liquid is introduced into the chamber 8 through a second inlet conduit or pipe II which,--

as shown, is. preferably an integral part of the main nozzle section I. The branch inlet It opens into the forward end of the suction chamber 6 d ,is inclined to the axis of the inner nozzle 2 nd nozzle outlet 9 to provide a non-turbulent merging of the water stream and the treating liquid stream. The branch inlet II has a threadedouter end l2 for'receiving the coupling unit it or; a short hose section it which-extends into a bucket I! that is placed on the ground." inlet I6 is located at the top of the main section I and communicates with the central portion of the suction chamber 6 through a passage that is controlled by the valve i1. 7 I w A spray or deflectingjplate I8 is mounted on the outer'end of the nozzle by a pivot sc'rew i9 which extends heneathand transversely of the nozzle outlet 8. The outeriend of the plate is preferably given a slight upward inclination to permit the formation ofa free-Jet, of circularcross-section, before the jet strikes the plate. The plate may be set at any desired angle to vary the size and shape of the flat spray, or it maybe turned down to clear the water Jet.

The general method of operation is that of an aspirating nozzle. The jet of water projected through the lnner'nomle opening l0 creates a reduced pressure in chamber. 8 by its passage through the 'venturi or reduced diameter section. The reduced pressure lifts the treating liquid upwardly from the container 15 and this liquid-- mixes with the water and is projected from the main nozzle. A dilution of the order often or twenty to one may be obtained by adjustment of the valve ii to regulate the amount of air which *enters the annular chamber 8.

The change in cross-section between the jet outlet l0 and the minimum diameter section results in a self-priming action that is not accompanied by-a loss in efllciency or lifting power. The high capacity is due to the high velocity of the jet from the inner nozzle, and the self-priming is due to the sealing action produced by'portions of the high velocity jet that strike the inner wall adjacent the restricted section. With cross-sections,oi the same shape, a small high velocity jetwill not strike the wall of the bore to seal off the suction chamber 0, and a Jet of suflicient diameter to give this sealing action will be' of low lifting capacity after ,thenozzle is primed to fill the chamber with liquid.

Other cross-sections may be used to obtain this self-priming action with a high velocity jet, or a battle wire maybe used to 'divert the jet against the walls of the restricted section when a round jet is used. It is to be understood that the invention is not restricted'to xtheparticular embodiment here-- in described, and that changes may bemade in the size, shape and relatio n of the several parts 'wlthput departing from the spirit of my invention as set forth in the following claims.

I claim:

-1-.- In a spray nomle of the. character described,

.a point adjacent said injector outlet toward the nozzle end thereof; an inlet branch integral with said main section and having a passage opening into said bore and converging therewith in the direction of the outlet end thereof, and means providing a single air inlet opening into the bore of said main section between the inlet end thereoi and the junction of said inlet branch therewith.

2. In a spray nozzle oi the character described, a main section having a bore extending therethrough terminating in. a noszleoutlet at one end. an injector mam mounted in the inlet end of said bore axially of and spaced from. the walls 'thereoLsaid injector nomle having an outlet of angular cross-section terminating intermediate the ends of said bore and said bore tapering 1mm a point adjacent said injector outlet toward the nozzle end thereof, an inlet branch integral with said main section and having a passage opening into said bore andconverging therewith in the direction of the outlet end thereof, means pro-s viding a single air inlet opening into the bore of said main section-between the inlet end thereoi and the junction of said inlet branch therewith, and a deflector plate pivotally mounted at the ironic end of said main section adapted to intercept the fluid stream'emerging therefrom.

' manna/Manor. 

